Display module having insulation portion at front frame for preventing undesired electrical connection and display device having the same

ABSTRACT

A display module and a display device are provided. The display module includes a display panel and a front frame. The display panel includes a display region and a non-display region both located at a side of a light emitting surface. The non-display region is disposed at a peripheral area of the display panel and is provided with a test pad electrically connected to a wiring of the display region. The front frame includes a front plate opposite to at least a portion of the non-display region and having an electric conduction portion for conducting away an electrical current and an insulation portion for insulating the electric conduction portion from the test pad on the display panel.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a divisional application of co-pending patent application Ser.No. 13/985,672, filed on Aug. 15, 2013.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the display field, and moreparticularly to a display module and a display device.

2. Description of Related Art

The Liquid Crystal Display (LCD) has high display quality, small size,light weight and wide application ranges, etc. The LCD is widely appliedin mobile phones, laptop computers, televisions and other electronicproducts. The liquid crystal display panel is the most important elementof the LCD, which typically comprises an array substrate, a color filter(CF) substrate, and a liquid crystal layer which is interposed betweenthe two substrates. Through controlling the voltage between the CFsubstrate and the array substrate, it drives liquid crystal molecules inthe liquid crystal layer to be deflected in different display screens.

Wherein, the array substrate is provided with a plurality of scan lines,a plurality of data lines and a plurality of pixel electrodes arrangedin a matrix, thin-film transistors (TFTs), and a first common electrode.The CF substrate is provided with a second common electrode. In the LCDcell process, it usually utilizes a shorting bar to perform a lightingtest so as to test the yield of the LCD panel.

With reference to FIG. 1, in a non-display region 114 of the arraysubstrate 111, it is typically provided with seven shorting bars 111,and two of them are respectively and electrically connect toodd-numbered data lines 1112 and even data line 1113 on the arraysubstrate 111. Three of them are respectively and electrically connectedto a red pixel, a green pixel and a blue pixel scan lines 1114 of thearray substrate 111. The remaining one of them is electrically connectedto a first common electrode 1115 of the array substrate 111, and theother remaining one is electrically connected to the second commonelectrode 1121 through the CF substrate 112. Two ends of the shortingbar 1111 are provided with test pads 1117. Under the lighting test,inputting test signals to the data lines, scan lines, or the commonelectrode which are electrically connected to the corresponding shortingbar 1111 through the test pads 1117 to test a screen of the LCD panel110. When the testing is completed, utilizing the grinding or the lasercutting to disconnect the connection between the shorting bar 1111 andthe scan lines, data lines or the common electrodes.

In the LCD panel 110, a first test pad 1118 which is electricallyconnected to the first common electrode 1115 of the array substrate 1111and a second test pad 1119 which is electrically connected to a secondcommon electrode 1121 of the CF substrate 112. The two test pads arefarther apart from the other test pads 1117. When utilizing the lasercutting, the cutting region AA′ of the laser cutting is limited. Itoften occurs that the first test pad 1118 and the second test pad 1119are not in the cutting region AA′. Therefore, even after performing thelaser cutting, the first test pad 1118 is still electrically connectedto the first common electrode 1115 and/or the second test pad 1119 isstill electrically connected to the second common electrode 1121.

Please continue to refer to FIG. 2, in the conventional LCD, the frontframe 120 is generally a non-metal material, but in order to prevent acurrent flowing through the LCD panel 110 in the Electro-Staticdischarge (ESD) testing, it often attaches an electrically conductivefilm 121 at the inner side of the front frame 120. The electricallyconductive film 121 contacts with the backplane 130 which is grounded toensure that the front frame 120 is also grounded (GND). If the frontframe 120 is excessively pressed in the assembly process of the LCDpanel 110 and the front frame 120, it may cause a deformation of thefront frame 120 such that the electrically conductive film 121 of thefront frame 120 may contact the test pads 1117 of the LCD panel 110 (asshown in FIG. 3). Or, it may cause electrically conductive film 121 ofthe front frame 120 to tilt up such that it contacts with the test padcontacts 1117 of the LCD panel 110 (as shown in FIG. 4).

In the above situation, if the first test pad 1118 which is stillconnected with the first common electrode 1115 and/or the second testpad 1119 which is still connected with the second common electrode 1121connect to the electrically conductive film 121 of the front frame 120,the potential of the first common electrode 1115 and/or the secondcommon electrode 1121 is GND. Therefore, it disturbs the reference baseof digital signal of the driver IC so as to cause a malfunction, thatis, it generates the LCD screen noise or flicker.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide a display moduleand a display device. They can reduce LCD screen noise or flickerphenomenon because the test pads of the display panel contact with thefront frame.

In order to solve the above technical problems, a technical solutionprovided by the present invention is: a display module comprising: adisplay panel including a display region and a non-display region bothlocated at a side of a light emitting surface, wherein, the non-displayregion disposed at a peripheral area of the display panel and providedwith test pads electrically connected to wirings of the display region,wherein, the test pads includes a first test pad and a second test pad;a first substrate provided with a first common electrode and a firstwiring electrically connected to the first common electrode inside thedisplay region, wherein, the first wiring electrically connects to thefirst test pad; and a second substrate disposed opposite to the firstsubstrate and provided with a second common electrode and a secondwiring electrically connected to the second common electrode, whereinthe second wiring electrically connects to the second test pad; and afront frame including a front plate disposed opposite to at least aportion of the non-display region, and having a first insulation layerstacked disposition and an electrically conductive film for conductingaway a current, wherein, the electrically conductive film disposes at aside of the front plate adjacent to the non-display region, and an areaof the electrically conductive film right opposite to the first andsecond test pads is hollowed out such that when the front plate contactswith the non-display region of the display panel under an externalforce, the electrically conductive film cannot contact with the firstand second test pads so as to insulate the electrically conductive filmfrom the first and second test pads on the display panel.

Wherein, the display module further comprises a backlight module, andthe backlight module includes a backplane electrically connected to atleast a portion of the electrically conductive film of the front frameto conduct away the current of the front frame.

In order to solve the above technical problems, another technicalsolution provided by the present invention is: a display modulecomprising: a display panel including a display region and a non-displayregion both located at a side of a light emitting surface, wherein, thenon-display region disposed at a peripheral area of the display paneland provided with a test pad electrically connected to wiring a of thedisplay region; and a front frame including a front plate disposedopposite to at least a portion of the non-display region, and having anelectric conduction portion for conducting away a current and aninsulation portion for insulating the electric conduction portion fromthe test pad on the display panel.

Wherein, the front plate includes a first insulation layer stackeddisposition and an electrically conductive film as the electricconduction portion wherein, the electrically conductive film disposes ata side of the front plate adjacent to the non-display region, and anarea of the electrically conductive film right opposite to the test padis hollowed out such that when the front plate contacts with thenon-display region of the display panel under an external force, theelectrically conductive film cannot contact with the test pad to formthe insulation portion for insulating the electric conduction portionfrom the test pad on the display panel.

Wherein, the front plate includes a first insulation layer stackeddisposition and an electrically conductive film as the electricconduction portion, wherein, the electrically conductive film disposesat a side of the front plate adjacent to the non-display region, and anarea of an outer surface of the electrically conductive film rightopposite to the test pad provides with a second insulation layer suchthat when the front plate contacts with the non-display region of thedisplay panel under an external force, the electrically conductive filmcannot contact with the test pad to form the insulation portion forinsulating the electric conduction portion from the test pad on thedisplay panel.

Wherein, the front plate is an electrically conductive plate, and anarea of an outer surface of the electrically conductive plate rightopposite to the test pad provides with a second insulation layer suchthat when the front plate contacts with the non-display region of thedisplay panel under an external force, the front plate cannot contactwith the test pad to form the insulation portion for insulating theelectric conduction portion from the test pad on the display panel.

Wherein, the test pad includes a first test pad and a second test pad,and the display panel comprises: a first substrate provided with a firstcommon electrode and a first wiring electrically connected to the firstcommon electrode inside the display region, wherein, the first wiringelectrically connects to the first test pad; and a second substratedisposed opposite to the first substrate and provided with a secondcommon electrode and a second wiring electrically connected to thesecond common electrode, wherein the second wiring electrically connectsto the second test pad; wherein, the insulation portion of the frontframe is disposed right opposite to the first and second test pads onthe display panel so as to insulate the electric conduction portion fromthe first and second test pads.

Wherein, the display module further comprises a backlight module, andthe backlight module includes a backplane electrically connected to atleast a portion of the electric conduction portion of the front frame toconduct away the current of the front frame.

In order to solve the above technical problems, another technicalsolution provided by the present invention is: a display devicecomprising a display module including a display panel including adisplay region and a non-display region both located at a side of alight emitting surface, wherein, the non-display region disposed at aperipheral area of the display panel and provided with a test padelectrically connected to a wiring of the display region; and a frontframe including a front plate disposed opposite to at least a portion ofthe non-display region, and the front plate includes an electricconduction portion for conducting away a current and an insulationportion for insulating the electric conduction portion from the test padon the display panel.

Wherein, the front plate includes a first insulation layer stackeddisposition and an electrically conductive film as the electricconduction portion wherein, the electrically conductive film disposes ata side of the front plate adjacent to the non-display region, and anarea of the electrically conductive film right opposite to the test padis hollowed out such that when the front plate contacts with thenon-display region of the display panel under an external force, theelectrically conductive film cannot contact with the test pad to formthe insulation portion for insulating the electric conduction portionfrom the test pad on the display panel.

Wherein, the front plate includes a first insulation layer stackeddisposition and an electrically conductive film as the electricconduction portion, wherein, the electrically conductive film disposesat a side of the front plate adjacent to the non-display region, and anarea of an outer surface of the electrically conductive film rightopposite to the test pad provides with a second insulation layer suchthat when the front plate contacts with the non-display region of thedisplay panel under an external force, the electrically conductive filmcannot contact with the test pad to form the insulation portion forinsulating the electric conduction portion from the test pad on thedisplay panel.

Wherein, the front plate is an electrically conductive plate, and anarea of an outer surface of the electrically conductive plate rightopposite to the test pad provides with a second insulation layer suchthat when the front plate contacts with the non-display region of thedisplay panel under an external force, the front plate cannot contactwith the test pad to form the insulation portion for insulating theelectric conduction portion from the test pad on the display panel.

Wherein, the test pad includes a first test pad and a second test pad,and the display panel comprises: a first substrate provided with a firstcommon electrode and a first wiring electrically connected to the firstcommon electrode inside the display region, wherein, the first wiringelectrically connects to the first test pad; and a second substratedisposed opposite to the first substrate and provided with a secondcommon electrode and a second wiring electrically connected to thesecond common electrode, wherein the second wiring electrically connectsto the second test pad; wherein, the insulation portion of the frontframe is disposed right opposite to the first and second test pads onthe display panel so as to insulate the electric conduction portion fromthe first and second test pads.

Wherein, the display module further comprises a backlight module, andthe backlight module includes a backplane electrically connected to atleast a portion of the electric conduction portion of the front frame toconduct away the current of the front frame.

Comparing to the prior art, the present disposes an insulation portionat the front plate such that the insulation portion insulates theelectric conduction portion from the test pads which are electricallyconnected to the wirings of the display region of the display panel.Therefore, it can prevent that when the test pads of the display panelcontacts with the front plate, the test pads of the display panelelectrically connect to the electric conduction portion of the frontplate. Thus, it avoids the wirings of the display region of the displaypanel occurring the ground, that is, avoiding LCD screen noise orflicker because the test pads of the non-display region of the displaypanel contact with the front frame.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view of a display panel of a display modulein the prior art;

FIG. 2 is a schematic cross-sectional view of a display panel of adisplay module in the prior art;

FIG. 3 is a schematic cross-sectional view of a display panel of adisplay module after a deformation of a front frame in the prior art;

FIG. 4 is a schematic cross-sectional view of a display panel of adisplay module after an electrically conductive film is peeling off inthe prior art;

FIG. 5 is a schematic planar view of a display panel of a display moduleaccording to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a display panel of adisplay module according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a display panel of adisplay module according to another embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a display panel of adisplay module according to another embodiment of the present invention;and

FIG. 9 is a schematic planar view of a display device according to anembodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following content combines with the drawings and the embodiment fordescribing the present invention in detail.

With reference to FIGS. 5 and 6, FIG. 5 is a schematic plan view of adisplay panel of a display module according to an embodiment of thepresent invention and FIG. 6 is a schematic cross-sectional view of thedisplay module according to the present invention. In the presentembodiment, the display module includes a display panel 510, a frontframe 520 and a backlight module 530. The display panel 510 includes adisplay region 513 and a non-display region 514, which are both locatedat a side of a light emitting surface. The non-display region 514 isdisposed at a peripheral area of the display panel 510. The front frame520 is disposed on the non-display region 514 of the display panel 510.The backlight module 530 is disposed at a side of a light enteringsurface of the display panel 510.

The display panel 510 includes a first substrate 511 and a secondsubstrate 512 opposite to the first substrate 511. Corresponding to thedisplay region 513, the first substrate 511 is at least provided with afirst common electrode 5111 and a first wiring 5112 electricallyconnected to the first common electrode 5111; and the second substrate512 is at least provided with a second common electrode 5121 and asecond wiring 5122 electrically connected to the second common electrode5121. (In FIG. 5, for convenience only, the first and the second commonelectrodes are schematically shown; however, in practice, thedisposition of the first and second common electrodes in the displayregion may be different from that shown in FIG. 5, this being equallyapplicable to the aforementioned FIG. 1.)

The common electrodes may provide reference potentials for thecorresponding substrates. Corresponding to the non-display region 514,the first substrate 511 is provided with a shorting bar 5113 for testingthe display region 513 and a test pad 5114 disposed at one end of theshorting bar 5113. In testing, the shorting bar 5113 is electricallyconnected to a wiring of the display region 513 of the display panel510. The test pad 5114 is disposed for facilitating the shorting bar5113 to input a test signal in the testing. In the present embodiment,the test pad 5114 is a metal pad. It can be understood that the test padis not limited to being disposed at ends of the shorting bar and thetest pad can be disposed at any position of the shorting bar, and thepresent invention is not limited to this.

In the present embodiment, the shorting bar 5113 includes at leastshorting bars that are respectively and electrically connected to thefirst wiring 5112 and the second wiring 5122. Correspondingly, the testpad 5114 includes at least test pads that are respectively andelectrically connected to the first wiring 5112 and the second wiring5122. For convenience of description, one of the test pads 5114 that iselectrically connected to the first wiring 5112 is defined as a firsttest pad 5115, and one of the test pads 5114 that is electricallyconnected to the second wiring 5114 is defined as a second test pad5116.

The front frame 520 includes a front plate 521 disposed opposite to atleast a portion of the non-display region 514 and a side plate 522. Thebacklight module 530 includes a backplane 531, which contacts with aportion of the side plate 522 of the front frame 520, wherein thebackplane 531 may be grounded. The front plate 521 and side plate 522further include a first insulation layer 5211 and an electricallyconductive film 5212 that serves as an electric conduction portionstacked on each other. The electrically conductive film 5212 is disposedone sides of the front plate 521 and side plate 522 that are adjacent tothe non-display region 514 of the display panel 510, and a portion ofthe electrically conductive film 5212 is electrically connected to thebackplane 531 so as to conduct a current of the front frame 520 to thebackplane 531 that is grounded. In the present embodiment, the firstinsulation layer 5211 is made of a plastic material. Of course, thefirst insulation layer is not limited to plastics. In anotherembodiment, the first insulation layer may be made of other insulationmaterials, such as insulation paints or rubbers.

In the display module, a portion of the electrically conductive film5212 of the front plate 521 is disposed opposite to the test pads 5114of the display panel 510. The front plate 521 further includes aninsulation portion 5213 for insulating the electrically conductive film5212 from the test pads 5114 on the display panel 510. In the presentembodiment, an area of the electrically conductive film 5212 rightopposite to the test pads 5114 is hollowed out such that when the frontplate 521 contacts with the non-display region 514 of the display panel510 under an external force, the electrically conductive film 5212cannot contact with the test pads 5114 to form the insulation portion5213 for insulating the electrically conductive film 5212 from the testpads 5114 on the display panel 510.

For example, an area of the hollow-out portion is larger than the testpads 5114. Of course, in another embodiment, the electrically conductivefilm can be hollowed out at an area right opposite to the test pads. Thehollow-out portion can make a portion of the electrically conductivefilm right opposite to the test pads and a portion of the electricallyconductive film not right opposite to the test pads insulating from eachother to form the insulation portion 5213 for insulating a portion ofthe electrically conductive film 5212 connected to the backplane fromthe test pads 5114 on the display panel 510.

It should be noted that, in this embodiment, the test pads mentioned areonly the first test pad and the second test pad, but the display moduleof the present invention may further include a shorting bar electricallyconnected to a scan line for testing the scan line and/or a shorting barelectrically connected to a data line for testing the data line, andtest pads disposed in the shorting bars. The insulation portion of thefront frame may only make insulation between the electrically conductivefilm and the first and second test pads or make insulation between theelectrically conductive film and the first test pad, the second testpad, and the above-mentioned test pads on the display panel.

Furthermore, in the display panel of the present embodiment, the firstand second test pads are disposed at a region farther away from theother test pads so that the first and second test pads may still connectto the first and second common electrodes after testing the displaypanel. Therefore, in the present embodiment, the insulation portion isat least configured to insulate the electrically conductive film fromthe first and second test pads.

But in other embodiments for other types of display module, the abovecondition is not used for the first and second test pads for testing thefirst and second common electrodes. Corresponding to that displaymodule, the insulation portion is for insulating the electricallyconductive film from the other test pads connected to the wirings of thedisplay region of that display module. Furthermore, the display moduleof the present invention may not include the shorting bars, and the testpads are other test pads which are not disposed at the shorting bars.Therefore, it does not limit the test pads here. The test pads of thepresent invention are arbitrary test pads which are disposed in thenon-display region and electrically connected to the wiring of thedisplay region.

Furthermore, the display module of the present invention is not limitedto a structure that involves a backlight module and conducts away anelectrical current of the front frame through a backplane of thebacklight module. In another embodiment, the present invention may notbe provided with a backlight module. The display module may be providedwith other ground configurations. The front frame and one of the otherstructures electrically connected to the ground can conduct the currentaway. Or, the display module is provided with a backlight module andother ground structures, and the front frame is electrically connectedto the other structures which are grounded to conduct away the current.Therefore, the backlight module of the display module and the waythrough an electrically current is conducted away from the front frame,as described above, are not intended to limit the present invention.

In the present embodiment, the first and second test pads of the displaymodule may be easily kept in electrical connection with the wirings ofthe display region after the testing. By hollowing out a portion of theelectrically conductive film of the front plate that is right oppositeto the first and second test pads, insulation is provided between theelectrically conductive film and the first and second test pads.Therefore, it avoids that when the electric conduction portion of thefront frame contacts with the test pads, the wirings in the displayregion are grounded. As a result, it avoids that screen noise andflicker of the LCD because of the test pads in the non-display region ofthe display panel contacting with the front frame.

With reference to FIG. 7, FIG. 7 is a schematic cross-sectional viewshowing a display module according to another embodiment of the presentinvention. The display module of this embodiment is basically the sameas the display module of the foregoing embodiment. A difference is thatan electrically conductive film 7212 of a front frame 720 does notinvolve a hollow-out structure. The electrically conductive film 7212 isdisposed at a side of the front frame 720 that is adjacent to thenon-display region 714 of the display panel 710. An outer surface of anarea of the electrically conductive film 7212 that is right opposite totest pads 7114 of the display panel 710 is disposed with a secondinsulation layer 7213 such that when a front plate 721 of the frontframe 720 contacts with the non-display region 710 of the display panel714 under an external force, the electrically conductive film 7212 doesnot contact with the test pads 7114 so that an insulation portion can beformed between the electrically conductive film 7212 and the test pads7114 of the display panel 710. In the present embodiment, the secondinsulation layer 7213 is an insulating tape. Of course, the secondinsulation layer is not limited to the insulating tape. In anotherembodiment, the second insulation layer may also be formed of otherinsulating materials, such as insulation paints or rubbers.

With reference to FIG. 8, FIG. 8 is a schematic cross-sectional viewshowing a display module according to another embodiment of the presentinvention. The display module of this embodiment is basically the sameas the display module of the foregoing embodiment. A difference is thata front frame 820 is not provided with the first insulation layer andthe electrically conductive film, and instead, a front plate 821 and aside plate 822 of the front frame 820 are both electrically conductiveplates so that the entire front frame 820 is an electric conductingpart. The side plate 822 of the front frame 820 contacts with abackplane 831 of the backlight module 830 so as to achieve an electricconnection for conducting away a current at the front frame 820. Anouter surface of the front plate 821 of the front frame 820 in an arearight opposite to the test pads 8114 of the non-display region 814 ofthe display panel 810 is provided with a second insulation layer 8213such that when the front plate 821 contacts with the non-display region814 of the display panel 810 under an external force, the front plate821 cannot contact with the test pads 8114 of the non-display region 814so that an insulation portion can be formed between the front plate 821and the test pads 8114 on the display panel 810.

It should be noted that in the foregoing embodiments, the displaymodules are all LCD modules, but it does not limit the present inventionto be the LCD modules. The display module of the present invention maybe other modules that provide with test pads which electrically connectto wirings of the display region in the non-display region, and a frontframe provides with a conductive structure such as an OrganicElectroluminescence Display (OELD) module or a plasma module, etc.

With reference to FIG. 9, it is a schematic plan view showing a displaydevice according to an embodiment of the present invention. In thepresent embodiment, the display device includes a display module 910 andan outer housing 920 disposed around the display module 910. The displaymodule 910 is one of the display modules shown in the foregoingembodiments and a detailed description can refer to FIGS. 5 to 8 and thedescription of the foregoing embodiments. Repeated description will beomitted here.

Comparing to the prior art, the present invention comprises aninsulation portion provided on the front plate such that the insulationportion insulates the electric conduction portion from the test padsthat might be electrically connected to the wirings of the displayregion of the display panel. Therefore, it can prevent that when thetest pads of the display panel contact with the front plate, the testpads of the display panel electrically connect to the electricconduction portion of the front plate. Thus, it avoids the wirings ofthe display region of the display panel being undesirably grounded, thatis, avoiding LCD screen noise or flicker because the test pads of thenon-display region of the display panel contact with the front frame.

The above embodiments of the present invention are not used to limit theclaims of this invention. Any use of the content in the specification orin the drawings of the present invention which produces equivalentstructures or equivalent processes, or directly or indirectly used inother related technical fields is still covered by the claims in thepresent invention.

What is claimed is:
 1. A display module comprising: a display panelincluding a display region and a non-display region both located at aside of a light emitting surface, wherein the non-display region isdisposed at a peripheral area of the display panel and is provided witha test pad electrically connected to a wiring of the display region; anda front frame including: a front plate that is arranged in a first stateas being opposite to at least a portion of the non-display region andcomprises a predetermined portion to which an electrically conductiveportion is mounted for conducting away an electrical current, whereinthe electrically conductive portion has a surface facing the test padand is provided with a layer of an insulation material that is mountedto an area of the surface of the electrically conductive portion to beexactly opposite to and spaced from the test pad by a spacing distancein the first state and wherein the predetermined portion of the frontplate is variable in position with respect to a remaining portion of thefront plate such that the front plate is changeable from the first stateto a second state where the electrically conductive portion provided onthe predetermined portion of the front plate is moved toward the testpad to set the layer of the insulation material on the test pad suchthat the layer of the insulation material is located and sandwichedbetween the electrically conductive portion provided on thepredetermined portion of the front plate of the front frame and the testpad provided in the non-display region of the display panel, wherein twoopposite sides of the layer of the insulation material are respectivelyin contact engagement with the electrically conductive portion of thefront plate of the front frame and the test pad to provide electricalisolation between the electrically conductive portion of the front plateof the front and the test pad, wherein the layer of the insulationmaterial is in contact engagement with the electrically conductiveportion of the front plate of the front frame and is separate from thetest pad by the spacing distance in the first state such that theelectrically conductive portion of the front plate of the front frame iselectrically isolated from the test pad by the layer of the insulationmaterial and the spacing distance and wherein the layer of theinsulation material is in contact engagement with and sandwiched betweenthe electrically conductive portion of the front plate of the frontframe and the test pad such that the electrically conductive portion ofthe front plate of the front frame is electrically isolated from thetest pad by the layer of the insulation material alone.
 2. The displaymodule as claimed in claim 1, wherein the front plate of the front framecomprises an insulation portion on which the electrically conductiveportion is mounted.
 3. The display module as claimed in claim 1, whereinthe front plate of the front frame comprises an electrically conductivematerial having at least a part forming the electrically conductiveportion.
 4. The display module as claimed in claim 1, wherein the testpad comprises a first sub-pad and a second sub-pad and wherein thedisplay panel comprises a first substrate that is provided with a firstcommon electrode and a first wiring electrically connected to the firstcommon electrode, the first wiring being electrically connected to thefirst sub-pad; and a second substrate that is opposite to the firstsubstrate and is provided with a second common electrode and a secondwiring electrically connected to the second common electrode, the secondwiring being electrically connected to the second sub-pad.
 5. Thedisplay module as claimed in claim 1 further comprising a back lightmodule that comprises a backplane in electrical connection with theelectrically conductive portion of the front plate of the front frame toconduct away the electrical current.
 6. A display device comprising: adisplay module, which comprises: a display panel including a displayregion and a non-display region both located at a side of a lightemitting surface, wherein the non-display region is disposed at aperipheral area of the display panel and is provided with a test padelectrically connected to a wiring of the display region; and a frontframe including: a front plate that is arranged in a first state asbeing opposite to at least a portion of the non-display region andcomprises a predetermined portion to which an electrically conductiveportion is mounted for conducting away an electrical current, whereinthe electrically conductive portion has a surface facing the test padand is provided with a layer of an insulation material that is mountedto an area of the surface of the electrically conductive portion to beexactly opposite to and spaced from the test pad by a spacing distancein the first state and wherein the predetermined portion of the frontplate is variable in position with respect to a remaining portion of thefront plate such that the front plate is changeable from the first stateto a second state where the electrically conductive portion provided onthe predetermined portion of the front plate is moved toward the testpad to set the layer of the insulation material on the test pad suchthat the layer of the insulation material is located and sandwichedbetween the electrically conductive portion provided on thepredetermined portion of the front plate of the front frame and the testpad provided in the non-display region of the display panel, wherein twoopposite sides of the layer of the insulation material are respectivelyin contact engagement with the electrically conductive portion of thefront plate of the front frame and the test pad to provide electricalisolation between the electrically conductive portion of the front plateof the front and the test pad, wherein the layer of the insulationmaterial is in contact engagement with the electrically conductiveportion of the front plate of the front frame and is separate from thetest pad by the spacing distance in the first state such that theelectrically conductive portion of the front plate of the front frame iselectrically isolated from the test pad by the layer of the insulationmaterial and the spacing distance and wherein the layer of theinsulation material is in contact engagement with and sandwiched betweenthe electrically conductive portion of the front plate of the frontframe and the test pad such that the electrically conductive portion ofthe front plate of the front frame is electrically isolated from thetest pad by the layer of the insulation material alone.
 7. The displaydevice as claimed in claim 6, wherein the front plate of the front frameof the display module comprises an insulation portion on which theelectrically conductive portion is mounted.
 8. The display device asclaimed in claim 6, wherein the front plate of the front frame of thedisplay module comprises an electrically conductive material having atleast a part forming the electrically conductive portion.
 9. The displaydevice as claimed in claim 6, wherein the test pad comprises a firstsub-pad and a second sub-pad and wherein the display panel comprises afirst substrate that is provided with a first common electrode and afirst wiring electrically connected to the first common electrode, thefirst wiring being electrically connected to the first sub-pad; and asecond substrate that is opposite to the first substrate and is providedwith a second common electrode and a second wiring electricallyconnected to the second common electrode, the second wiring beingelectrically connected to the second sub-pad.
 10. The display device asclaimed in claim 6, wherein the display module further comprises a backlight module that comprises a backplane in electrical connection withthe electrically conductive portion of the front plate of the frontframe to conduct away the electrical current.